Silver Lake (near Shelby Michigan, on the Lake Michigan coast) dunes custom IH tour buses powered by 392s, these were many generations after the Mac Wood dune ride company started in the 1930s

https://www.thedrive.com/news/these-vintage-ih-dune-scooters-are-being-saved-from-retirement-and-put-back-to-work

https://macwoodsdunerides.com/explore/gallery/